Shoe-sewing machine



Se t. 192

p 3 w. c. MEYER SHOE SEWING MACHINE 2 Sheets-Sheet 1 Filed Aug. 8, 1919Sept. 25,1923. 1,468,912

' W. C. MEYER snos SEWING MACHINE Filed Aug. 8, 1919 2 Sheets-Sheet 2 35fievenior Patented Sept. 25, 1923.

WIL IAM' MEYER, or BEVERLY, aressaonusnrrs, assrenoa ro umrnnsnonkMAcHmnaYconroReTIoN, or Paras-son, NEW JERSEY ACORPORATION or NEW'JERSEY.

SHOE-SEWING .MACHINEl,

Application filed August 8, 1919. Serial No. 316,241. i

To all whom it may concern Be it known that 1, WILLIAM OJMEYER, acitizen of the United States, residing at Beverly, in the county ofEssex and State of Massachusetts, have invented certain new and usefulImprovements in Shoe-Sewing Machines; and I do hereby declarethe-following to be a:fu1l, clear, and exact description ofitheinvention, such; as will enable othersskilled in the art to which it appertains to make and use the-same This invention relates to shoesewing-inachines of the class provided with a straight hook needle andwith a rotatable work sup porting horn arranged .to extend within theshoe, such machines being generally known in the art as machines of theMcKay type.

In certain machines of this type, the tension mechanism comprises atension wheel mounted on a shaft rotatably mounted in ,the base of thehorn, and devices for retarding .the rotation of the tension wheel shaftto apply tension to the thread. With this construction oil, wax or dirtis often deposited upon the uppers of shoes while they are being sewnthrough contact of the uppers-with.

the parts of the tension mechanism, and the stock is thereby-discoloredand soiled. This is a serious disadvantage, particularly when shoes oflight or delicate-coloring are being manufactured. V I The primaryobjectof the present invention is to produce a machine of the McKay consistsin the provision of an enclosing casing for the tension device lnvolvlngcer tam-novel and improved constructions, ar-

rangements and combinations ofparts hereinafter described andparticularly pointed out inthe. claims the'advantagesof which will bereadily; understood and appreciated by those skilled in the art. 7

, The invention will be clearly understood from the accompanyingdrawings illustrating the invention in its preferred form, and thefollowing detailed descriptionof the constructions therein-shown.

and Fig. 4 is a'detail view inside of (the McKay type.

moved from the horn.

In the drawings Figurejl isa view in frontelevation of a portion of aMcKay sewing machine embodying thefinventionjFig. 2 is a View infrontelevation illustrating the base of the horn and'associatedpartswith certain of the parts in different positions from those in whichthey are shown inFig;

1; Fig. 3is a detailplan view illustratingthe enclos ng casing detachedfrom the machine;

illustrating the tension mechanism.

1 elevation .The machine illustrated "in the drawings comprisesavertically reciprocating straight hook needle 2,-a feed point or.awl'4, a

'presser foot 6, and a rotatable work sup- .portinghorn 8,jall of whichparts-have th'e same general construction, arrangement and t mode ofoperation as is usual in machines thread passes from the base ofthe-hornto The "horn is formed with the usual groove 10 through whichthe" the whirl. located in orn7 and e I is provided with a guard 12inserted in the outer portion of said groove to enclose the thread.--The horn guard is held in-place within'the'groove 10- by meansofa'spring pressed latchjpin 14 mounted to slide longi- 'tudina'llyiin thewall of the horn, the inner endof which is arranged to engage "in are.

cess in the horn guard. A knob 16 is mounted on the outer end of 'thelatch pin'rl'to enable the latch pinto'be withdrawn manually fromengagement with the recess in I the horn guard when the guard is'to 'bere- The tension mechanism base of {the horn and has the same construc- Vofthemachine il-f lustrated inf the drawing. is mounted in the of partsasthe corresponding mechanism illustrated and described: in applicantspending application, fiSeriah No. 80,911, l

filed FebruaryQS, 1916. The'teusion mech anism 5 comprises a tensionwheel' lS about which the thread passes on itsfway from the supply tothe whirl or T looping device in the tip of'the horn. The tension lwheel is mounted upon ashaft 20 engaging in bearings in the w'all fofthe horn and 'extending through thxwall ofithe horntothe exteriorthereof. Upon one end of'the' shaft 20 is mounted a brake wheel 22 and apair or pivotally connected brake shoes 24 and 26 are supported on theperiphery of the brake wheel and are held from rotation therewith bymeans or a screw The brake shoes 24 and 26 are acted upon by a coiledspring 30 which normally holds the brake shoes in yielding engagementwith the brake wheel to retard the'rotation of the shaft 20 and thetension wheel.

To enable the thread to be relieved of tension so that it may be drawnfreely about the tension wheel, a lever 32 is pivoted on one end or" theshaft 20 and a second lever 3a is pivoted at 36,011 the lever 32. Thelower end of the lever 32 is arranged to engage an extension on thebrake shoe 24c, and the shorter armof the lever 3% is arranged toengagea lateral projection on the brake shoe 26. The longer arm of the lever34 is formed with a thumb plate 38 by means of which the operator maydepress this arm of the lever. The thread indicated at? in the drawingpasses upwardly through the base of a born about the tension wheel '18under a thread truck 41 mounted in the horn, and thence upwardly throughthe horn. By pushing the forwardly extending arm of the lever 3 Ldownwardly, the levers 34 and 32 are relatively actuated to separate thelower ends of the brake shoes and thus relieve the pressure of the brakeshoes on the brake wheel.

i In order to protect the uppers o1 theshoes from oil. wax ordirtwhichmight be deposited thereon by the contact of the uppers withtheparts ot'the tension mechanism. the

tension mechanism enclosed by a casing" vmounted on the base ofthe horn.This casmgcomprises two hollow sections 40 and 12' arranged to surroundthe base of thelhorn and to enclose the parts of the tension mechanism,as shown in Fig. 1. Each of the sections or" the casing is niovablymount ed .on the horn so that-the casing may be .opened to expose theparts of the machine enclosed by. the same. 'The section 40 of thecasing which encloses. the tension wheel brake mechanism is pivoted on astud 44 carried by a braciret l6 secured to a flange 48 on the base, ofvthe horn. The section 42 which encloses the left hand end of thetension wheel shaft and other parts on the left side of the horn, Fig.2. is pivoted ona st-ud 5O carriedv by the bracket $6. This manner ofmounting the two sections of the casino, enables each of theseqsectionsto be swung. in a horizontal planetoward and from thebase of the horn.Figs. 1 and 3 illustrate the sections, of the casing in closedpositions, while 2shows the same in open-positions, The two sections ofthe casmg when. closed surroundthe base of the horn, the section 40 b8119; cut away at 52 and the section {i2 being cut away at 5 to receivethe born. In order to hold the sections of the casing in closedpositions, a latch 56 is secured at 58 to the section 42 and is providedits tree end with a projection free end of the latch outwardly when the7 sections of the casing are being closed.

To enable the lever 38 to be'actuated to relieve the tension on thethread without opening the casing, the section 40' of the casing isprovided with an opening, 64 through which the longer arm of the leverprojects to the exterior of the casing. I p j 'When the casing is open,as shown in Fig. 2 the parts of the tension mechanism are accessible foroiling or adjustment and the horn guard 12 may be readily removed toenable the machine to be threaded.

Having explained the nature and object of the invention, and havingspecifically described machine embodying the invention in its preferredform, what is claimed is:

1; Ashoe sewing machinehaving, in combination, stitch forming devicesincluding a straight hook needle, a rotatable work supporting horn.tension device mounted'at 2v A shoe sewing machine havin igin comthebase of the hornga casing for enclosing the tension device comprisingtwo sections pivoted to swing in opposite directions n a' horizontalplane from closed to open positions. and a latch for holding saidsections normally in closed position. 3

3. A shoe sewing machine having. in combination stitch forming devicesincluding a straight hoolrneedle, a rotatable work supportingahorn, atension device mounted at the base of the horncomprising a tension wheelmounted within the horn. a tension up wheel shaft engaging: in hearings.in the wall of the horn and extending through saidwall to the exteriorthereof, a brake wheel m0unted on one end of said shaft, a brakeShOGQIlgaging the brake wheel, means for engaging the brake shoe withthe brake'wheel. devices for relieving the pressure of the brake shoe onthe brake wheel. a casing for enclosing the tension device comprising asection enclosing the brake mechanism pivoted to swing in a horizontalplane, a second section for enclosing the other end of the tension wheelshaft also pivoted to swing in a horizontal plane, and a latch forholding said sections in closed position. 4; A shoe sewing machinehaving, in combination, stitch forming devices including a straight hookneedle, a rotatable Work supporting horn, a tension device mounted atthe base of the horn, and a casing for enclosing the tension devicecomprising tWo sections pivotally mounted on the 'base of l the hornto'sWin'g in opposite directions'in a horizontal plane from closed toopened positions, said sections being cutaway to receive the horn andWhen in closed position surrounding the base of the horn.

WILLIAMC. MEYER. 7

